Cadillac Catera: NO OIL PRESSURE , HAVE THREE OIL SENDING

Customer Question

Hello and welcome to JustAnswer!If there is low or no oil pressure as verified with a manual gauge then you have an internal engine mechanical issue. The oil pump pickup could be restricted with sludge or debris, the oil pump may have failed, or it could be from bearing wear. Removing the oil pan for a physical inspection of the pickup would be the first step. If it is found to be clear then the bearings would need to be looked at.As a last resort if you're not wanting to repair the engine then thicker oil may give a small rise in pressure, provided there actually is some pressure and the pickup isn't restricted. If the pickup is restricted then thicker oil will make the problem worse.